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What Thickness Corten Steel Is Best for Garden Edging?
12
Sep
Sep
Choosing The Right Corten Steel Garden Edging Thickness
It’s one of the most important decisions when planning a landscaping project.
Too thin, and the edging may flex or distort over time.Too thick, and installation can become harder and more expensive than necessary.
So, What Thickness Of Corten Steel Is Actually Best For Garden Edging In Melbourne Conditions?
Let’s break it down.
Why Thickness Matters in Corten Steel Garden Edging
Corten steel (weathering steel) is designed to form a protective rust patina that preserves structural strength. However, the thickness of the steel directly affects:
Durability
Structural stability
Resistance to bending
Lifespan
Ease of installation
Cost
For permanent landscaping, thickness is not just a technical detail, it determines long-term performance.
1.6mm – Corten Steel Edging
The most common residential option, ideal for:
It is ideal for:
Lawn edging
Garden bed separation
Straight runs
Standard residential landscaping
DIY installations
Benefits:
Easier to bend for curves
Easier to install
Cost-effective
Strong enough for most home gardens
For typical suburban gardens, 1.6mm corten steel provides excellent durability and long-term performance.
2.0mm – When Should You Choose ?
Thicker corten steel edging is recommended for:
Commercial landscaping
High-traffic areas
Retaining soil with height difference
Long straight runs
Projects requiring extra rigidity
A thicker profile:
Offers greater structural strength
Reduces flexing
Performs better in harder ground conditions
However, thicker steel is less flexible for tight curves and can require more effort during installation.
2.5mm – Corten Steel Option?
2.5mm corten steel edging is typically used for:
Structural retaining applications
Public landscaping
Industrial or commercial installations
For most residential garden edging, this thickness is unnecessary and increases cost without providing additional benefit.
Does Thickness Affect Lifespan?
Yes, but not as much as people think.
Because corten steel forms a protective patina, even 1.6mm steel can last many years in Australian conditions.
The difference in lifespan between 1.6mm and 2.0mm for standard garden edging is often minimal in residential use.
The key is:
Quality steel
Proper installation
Correct drainage
Suitable ground preparation
What Thickness Is Best for Melbourne Gardens?
For most homeowners, 1.6mm corten steel garden edging is the ideal balance of strength, flexibility and value.
It provides:
✔ Long-term durability
✔ Clean lawn separation
✔ Easy curve creation
✔ Simple installation
✔ Cost efficiency
For heavier duty applications, stepping up to 2.0mm may be worthwhile.
Does Thicker Mean Better?
Not always. Thicker steel:
Costs more
Is harder to bend
Requires more effort to install
May not provide additional benefit for standard garden use
Choosing the correct thickness should match the purpose of your landscaping project not just the idea that “thicker is stronger.”
Final Recommendation
If you’re installing corten steel garden edging for a residential landscape project, 1.6mm is typically the best choice.
For commercial or structural applications, consider 2.0mm or above.
At Garden Edging Supplies, we supply high-quality corten steel edging designed specifically for Australian conditions providing the ideal balance between strength, flexibility and longevity.
